Hi Michael,

Thanks for the response. It's a portable scope, yes I have replaced the
batteries and also tried powering it directly from the AC adapter but
same results.

Since the entire display exhibits fading I think I can rule out the
elastomer connectors being the issue.

You might be on to something WRT the polarized filter. Anyway to
replace that? When I removed the lcd I could not really open up the
front of the lcd so not sure if the polarized filter could be removed
easily. What is the failure mode for the polarized filters. Do they go
bad with heat or moisture etc?

Thanks
Jay